Defendr : Smart Contract Vulnerability Scanner

Abstract

Defendr is a tool that scans smart contracts for vulnerabilities. The functionalities of a smart contract and various advantages of the blockchain architecture have resulted in an increase in the number of users in recent years. Smart contracts are commonly used to automate the execution of a contract or function such that all parties can be immediately sure of the outcome, without anyone’s involvement. The consequences of this user boost have resulted in cyber-attacks becoming more prominent. To solve a small part of this major issue, we have developed a smart contract analysis tool which intensively scans the solidity smart contract to find pre-defined vulnerabilities. The scanner works by mapping each section of the user’s contract to the pre-defined vulnerability database. When the vulnerability is detected, it is recorded and further scanning continues until all modules have been checked, then the user is notified with the recorded output. This tool contributes to enhancing the cybersecurity landscape and strengthening the defensive posture. This tool has a great scope and can be updated to cater to a larger set of vulnerabilities in the future with respect to the growing state of the blockchain ecosystem.